Milling-machine.



c. G.- FREDMAN.

MILLING MACHINE.

APPLICATION FILED .IAN. I4. |918.

Patented Nov'. 26, 1918.

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Ano/mers C. G. FREDMAN.

MILLING MACHINE.

APPUCAIION vm50 1ML 14, 191s.

Patented Nov, 26, 1918.

6 SHEETS-SHEET 3.

C. G. FREDMAN.

MLLING'MACHINE.

APPucATloN FILED lAN. 14. 191s.

1 ,285,66'7. Patente NOV. 26, 1918;

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47 y I l /0 C. G. FREDMAN.

MILLING MACHINE.

APPLICATION FILED IAN. I4. ISIS.

. Patented Nov. 26, 1918.

narran 'CHARLES e. FREDMAN, on BROOKLYN, NEW YORK.

MILLING-mamma.

Application led January 14, 1915.

To all 'whom t may concern.'

Be it known thatI, CHARLES G. FRED- MAN, a citizen of the United States, and re# isi siding at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Milling-Machines, of which the following .is a specification, such as will enable those skilled in the art to which it appertains to make and use the same. p

This invention relates to what are known as milling machines, and the object thereof is to improve a machine of this class so as to facilitate the working thereof in all classes of work for which such machines are designed `or adapted, and with this ob]ect in view the invention consists in the method of operating a machine of the class specified, as hereinafter described and in the construction by which said method is carried into effect.

The invention is fully disclosed in the following specification, of whi'ch the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a front vview'of a milling machine constructed according to my invention, the base portion of the machine, including the framework being only indicated in dotted lines andi the imiproved construction described and claimed herein being shown in full lines;

Fig. 2 a side view of the construction as Shown in Fig. 1;

Fig. 3 a front sectional view of the machine as made by me, or the head portion of said machine, said view being taken on the line 3-3 of Fig. 6; y

Fig. 4 a section on the line 4-4 of Fig. 3;

Fig. 5 asection on the line 5-5 of Fig. 3; A

Fig. 6 a section on the line 6-6 of Fig. 2;

Fig. 7 a section on the line 7 7 of Fig. 6;

Fig. 8 a section on the line 8-8 of Fig. 6;

Fig. 9 a section on the line 9--9 of Fig. 7;

Figs. 10 and 11 diagrammatic side views of the cutting tool which I employ and indicating the method of operating saidl tool;

Figs. 12 and 13 diagrammatic detail front views ofthe construction shown in Figs. 10 and 11; and, y

Fig. 14 a view similar to Fig. 3 but showing only a part of the construction and indi` 'eating a different use of the machine.

In the drawing forming part of this specification, reference being made to Figs. 1

Specicaton of Letters Patent.

Serial No. 211,764. v

and 2, I have indicated at 20 the base of the framework of a machine ofthe class specified, and at 21 the back upright or head portion of said frame work, and at 22 I have in'- dicated the main vertically movable table of a machine of the class specified, and at 23 and 24 the movable and adjustable tables with which machines of this class are usually provided, and at this time, I desire to say that my invention relates only to the upper structure of the machine, or that part thereof above thetables'23 and 24, or that part of the machine which involves and relates to the operation of the tool or tools employed, and in the practice of my invention I provide a supplemental frame 25 which is bolted or otherwise secured to the back frame member 21, and the supplemental frame 25 consists of the following parts, namely, a .base member 26, a back member 27, a short side member 28, a longer side member 29 and a central member 30.

The top central portion of the side member 28 is provided with a bearing 31, and

Patented Nov. 26, 1918.

centrally of the longer side member 29 is a v similar bearing 33, and rotatably mounted in the bearings 31, 32 and 33 is a main drive shaft 34 which may be driven in any desired manner by a pulley mounted on the end thereof, said pulleyor the means for driving said shaft being not shown.

A su plemental drive shaft .35 is mounted below tlie main drive shaft 34 and forwardly thereof in bearings 36 and 37 integral with, or forming a part of the longer side member 29, and the base member 26 respectively, as clearly` indicated' in Figs. l and 4 of ,the drawing.

Mounted on'the outer end of the supplemental drive -shaft 35 is a cone or stepped pulley 38 and mounted on vthe'inner end of f said shaft is a worm 39 adapted to drive a y worm gear 40 secured to a stub shaft 41 rotatably mounted in the base 26 and in a, supplemental bearing member 42 'integralwith the back 27 of the frame 25. A

Secured to the upper end of the stub shaft 41 is a beveled pinion 43 adapted to operate in connection with beveled gears 44 and `45 rotatably mounted on the main," drive shaft 34 between the frame members 29 and 30, and secured `to said shaft between said beveled gears is a clutch member 46 having a central annular recess 47 and the opposite sides'of which are provided heads L18 and L19 adapted to openection with clutch faces 50 and on inner sides of the beveled gears and respectively.

A cross bar 52 is secured 'to the the frame members 29 and 30 below the reir ter of the main drive shaft as clearly shown in- Figs.` 1 and Il, and pivoted centrally of said cross bar is a clutch operating lever 53, the inner end of which is provided with a yoke-shaped head 54: in the ends 'of which are mounted pins 55, the inner ends of which are provided with antifric tion rollers 56 which are-adapted to operate in the annular recess 47 in the clutch member, as clearly shown in Figs. 3 and 4. The outer end of the lever 53 is provided with* a handle portion 57 by means of which said lever may be manipulated to move the clutch member 46 into engagement with either of the beveled gears 44 or 45, as hereinafter described. v

Secured to the main drive shaft 34 between the frame members Q8 and 30 is an eccentric gear 58 which operates in connection with another and similar eccentric gear 59 secured to a rotary power shaft 60 mounted in the top portion of the frame 25 forwardly of the main drive shaft 34 and in bearings 61 and 62 in the frame members 28 and 30 respectively. One end portion of the shaft 60 is provided with a rectangular head 63 in which is mounted a threaded shaft 64 supported in end plates 65 and 66, and secured to one end portion of the threaded shaft 64 is a milled head 67 by means of which said shaft may be rotated to move a block 68 longitudinally thereof.

The block 68 has a tongue and groove connection with the head 63, as clearly shown in Fig. 9, and a gib 69 is employed. as in other machines of this class. said gib being held in place by set screws 70 shown in Figs. 1 and 9. The block 68 is provided with a stud 71 having a reduced threaded portion 72 and a bearing sleeve 78 is mounted on the stud71 as shown in Figs. 3 and 9, and mounted on said stud and said sleeve is a main power rack 74 held in place by a' nut 7 5 mounted on the reduced threaded portion 72. l Y

rThe frame members 28 and 30 are provided, forwardly of and beneath the bearings 31 and 32, with other bearings 76 and 77 in which is mounted an, oscillatory stub shaft 78 provided at one end with a rectangular cross head 79 bolted to an oscillating head 80, as clearly shown in Figs. 1 and 6.

The main power rack 74 has a tongue and groove connection with the oscillating head 80, as shown at 81 in Fig. 6, and a gib 82 is employed in the usual manner, said gib being held in place by set screws 83 one of which is shown in said figure. Mounted in *lessees the head forwardly of the anni: pom-r rack 711 is a supplemental driven rack and tool bolder 84 which also has a tongue and ."roove connection with said head shown on with the racii di, said gib bring held in place by set screws 87, and by bolts S6 passed therethrough. The gib 86 is pro0 vided with elongated slots 69 where said bolts pass through the same as clearly shown in Fig. 8.

The supplemental rack is provided at the top thereof with an enlarged head portion 90 having a bearingextension 91 at one side thereof, and a forwardly directed bearing extension 92. The front` face of said rack is provided with a rectangular apcrturi`A or recess 93 which extends from the base o the forwardly directed bearing 92 to tht` bottom of said rack. and adjustably mounted in the bottom portion of said aperture is a tool lainpiner plate 0l provided with a tool aperture 95 having a beveled rib 96 in the back wall thereof. and a tool 9T is adapted to be mounted in the aperture 95 and held therein by the rib 96 which enters a corresponding recess 98 in the shank of the tool, and a transverse plate 99 is bolted to the face of the supplemental rack Si. and this plateserves to hold the tool 97 in tirm connection with Said rack.

Rot'atably mounted in a central tion 100 of the head 80 are two vertically arranged shafts 101, and 10:2 on which are mounted `gears 103 and 104 respectively, and said gears are adapted to operate in connection with the gear faces 105 and 106 ou the racks 741 and 8-1 respectively. The end portions of the shaft 10:2 are mounted in rectangular sleeve bearings 107, the top faces of which are beveled inwardly as shown at 106 and wedge-shaped bolts 109 are mounted above the sleeve bearings 107 and are adapted to be. forced outwardly b v nuts` 110 mounted on the outer ends thereof. and this construction serves to hold the shaft 102 in the proper or any desired position, as will be readily understood. The central web portion 100 is provided above the gear 1023 with a vert-ical aperture 111 through which the nut 75 on the. end of said stud 71 is adapted to pass in the vertical movement of the rack 74, as will be readily understood on a consideration of Fig. 3 of the drawing.

Adjustably mounted. in the aperture 93 in the supplemental rack Si is a tool lsupporting` block 112, consisting of a back rectangular portion 113 which is movable in said aperture, and one side edge of which is provided with a rack construction 114. and said portion 11.3 is held within the aperture 93 in any desired position ot' adjustment of the block 112 by clamp plates 115 secured to the opposite faces of the rack Sl. as clearly indicated yin Fig. 6 of the drawing.

. and a gib S6 is a v ioyed in conweb por- A One of the clamp plates 115 is provided, approximately, centrally thereof with a boss 116 in which is mounted a shaft 117 to the inner end of which is secured a pinion 118, which operates in connection with the rack construction 114 at one side'of the rectangular portion 113 of the block 112, and secured to the front end of the shaft 117 is a crank 119 by means of which the shaft 117 may be rotatedY to adjust the tool supporting block 112 vertically in the aperture 93, in which operation the bolts 120 for holding the clamp plates 115 in place are loosened to permit of said adjustment, after which said bolts are tightened and this serves to hold said block in firm connection with the block 84.

The front portion of the tool supporting block 112 is provided with an annular head 121 in which is mounted a bearing sleeve 122 within ,which is rotatably mounted a tubular shaft 123, the lower end of which is provided with a central tapered aperture 124 adapted to receive a shank 125 of a tool supporting chuck 126. Connected with the top of the shank 125 isa rod 127 which passes through the top portion 128 of the tubular shaft 123 and is provided at its upper end with a nut 129 which serves to hold the tool supporting chuck 126 in proper position, as will be readily understood.

tical movement in the block -112 by a flanged base portion 130 and a detachable nut 131 mounted above the sleeve bearing 122 as clearly shown in Figs. 3 and 14. The tubular sha-ft 123 is vertically movable through a sleeve bearing 132 mounted in the for- .wardly directed `bearing 92 on the top of the rack 84, and secured to and movable longitudinally of the top portion of the shaft 123 is a spiral gear 133 which meshes with a similar gear 134 mounted on the end portion of a shaft 135 supported in the side bearing extension 91 on the top of the rack 84.

The longer side frame member 29 extends above the top of the back member 27 of the frame 25 and isprovided in the top portion thereof with a bearing 136 having a supple-` mental power shaft 137, and bolted to said side member 29 below the bearing 136 is a bracket frame 138, comprising a. front plate 139, a cylindrical web portion 140 anda back cross head 141. The top of the cross head 141 is provided with a bearing 142 similar to the bearing 136 and adapted to support the shaft 137, while the bottom portion of the cross head 141 is provided with a bearing- 143 which serves to support the rearwardly directed portion of the main drive shaft 34.

Mounted on `the shaft 137 between the bearings 136 and 142 is a cone or stepped pulley 144 which is in vertical alinement with the pulley 38, and is adapted to operate in connection therewith by a belt passed therearound, as will be readily understood, but said belt is not vshown in the drawlng,

and it will be also understood that said pul- Imanner, and is commonly known in this art.,

and for this reason such details have not been shown, said shaft being adapted to rotate the spiral gear 134 on the end of the shaft 135 which in turn rotates the spiral gear 133 to rotate the tubular shaft 123 to rotate the tool supported in the clutch 126 as will be readily understood.

One side of the rectangular head 63 on the end of the shaft 60 is provided with a scale from Zero to two inches, as indicated at 148' in Fig. 1, which scale extends from the center of the shaft 60 upwardly or outwardly two inches as shown, but the extent of this scale ,j Awill be determined by the size and construc- The tubular shaft 123 is held against vertion of the head 63 as will be readily understood. The head portion of the rack 74 is provided with a scale mark 149 which is in line with or designates the center of the stud 71 on the block 68, which mark is adapted to register with the scale 148 on the head .63 and by manipulating the milled nut 67 on the end of the threaded shaft 64, said block 68 may be moved vertically in said head to bring the mark 149 into any desired position along the scale 148. The position of the head shown in Fig. 1 is at the extent of its movement on the scale 148.

In the construction shown, each of the bearings 31, 32, 33, 36, 42, ci, e2, 76, 77,91, 136, 142 and 143 are provided with detach` able caps as clearly shown in the drawing, whereby the shafts mounted therein may -be easily set in place and whereby new sleeve bearings may be provided whenever desired.

In Fig. 14 I have shown the operative parts of my improved machine in a different position from that shown in Figs. 1 to 13 inclusive, in which position of said parts the rack'bars 74, and 84 are brought into neutral position, or the center of the stud 71 is brought in line with the center of the shaft 60, whereby the rotation of the shaft 60 will not move said racks vertically in the head 80 as in the construction' shown in Figs. 1 to 13 inclusive, and the tool 97 is detached from figura and a rotary milling tool 150 of the usual form and construction is connected with the chuck 126, it being understood that said block 112 is moved downwardly from the position shown in F 3 to that shown in Fig. 14 by the operation of the crank 119, as hereinbefore described.

in the position oit the parts of my machine, as shown in Fig. 14 the same will operate as an ordinary milling machine., and in practice when it is desired to cut into a workpiece 151 to any great extent said workpiece is placed upon the table members 23 and 24, and secured thereto in the usual manner, and adjusted to bring said workpiece in. line with the milling tool 150, after which said tool is rotated by applying power to the shafts 13T` 145 and 135, as will be readily understood, and with this tool and by manipulating the tables 23 and 24, the workpiece 151 may be roughed out as indicated at152 in Fig. 14 in the usual manner, after which the block 112 may again be raised into the position shown in Fig. 3 and the tool 150 detached from the clutch 126 and the finishing cuts on the workpiece 151 may be accomplished in the following manner.

lThe operation of the main working part of my improved machine will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following statement thereof. The workpiece 151 after being roughed out, as hereinbefore described, is brought into line with the tool 97 sup-- ported in the rack 84 by manipulating the tables 23 and 24, and said tables, including the main bed plate 22 are further manipu lated to bring the top face 153 of said workpiece six inches from the mark 154 on the face of the head 80, as indicated in Fig. 2, which mark indicates the center line of the shaft T8. rthe relative centers of the shafts 50 and 78 are six inches apart as indicated in Figs. 12 and 13 of the drawings. The next step is to adjust the block 68 vertically in the head 63 'to bring the mark 149 to the desired position on the scale 148 to perform the next cut on the roughed workpiece which will be determined by the operator of the machine, and in performing the finishing cut. the block 68 is adjusted to bring the mark 149 to the indication of two'inches on the scale 148, and in Figs. 10 to 13 inclusive,

1 have indicated the operation of the tool 98 and the parts with which it is connected, or'by which it is operated, through the finishing operation of said tool, or its operation in performing the finishing cut. 1n Figs. 10 and 12 l'have shown in full lines the tool 97 in its highest position and in dotted lines 1 have indicated the position of said tool at one-quarter revolution of the shaft 60. while in Figs. 1l and 13, l have indicated in full lines the position said tool assumes at one-halt or a revolution or" the shaft 60, and have indicated in dotted lines the position said tool assumes on a threequarter revolution of the shaft 50, 'the linislied cut or aperture in the. workpiece 151 being indicated in full and dotted lines in Fig. 11 at 155, and it will be noted that the full line position of the tool 97 is shown in Figs. 1, 2 and 3, while the parts for operating said tool shown in Figs, 1 to 9 inclusive are in a corresponding position, the eccentric gears 58 and 59 being driven by the shaft direct.

ln the joregoing description l have stated t-hat the top face 153 of the workpiece 151 is located sin inches from the center of the shaft 73 in performing the finishing cuts, or operations in said workpiece, but it must also be understood that thecutting face. or area of the tool 97 when secured in the rack 34 and when said rack is in its neutral position as shown in Fig. 14, the distance between said cutting face on said tool and the center of the shaft 7 8 must also be six inches, and in F ig. 3 of the drawing it will be noted that the tool clamping plate 94 is provided in its rear face with notches or recesses adapted to receive an angular projection 84*1 on the rack 84 within the aperture 93, whereby said tool clamping plate may be adjusted vertically in the rack 84.

F or the purpose of description the top face 153 of the workpiece will be regarded as vthe predetermined working'plane, or the plane through which the tool 97 passes to perform a semi-circular cut in said workpiece. and while the said plane is located at the. face of the workpiece, as hereinbefore described, it will be understood that said plane may be located anywhere from the base portion to the top face of said workpiece ranging parallel with the supporting table or bed plate, and this line is preferably scribed on said workpiece by the opera-tor of the machine and the foregoing steps followed exactly in order to perform the desired cut in the workpiece, and in this connection l desire to say that regardless of where the predetermined plane is located on the workpiece the tool, or the cutting face thereof will always pass through said plane in a semi-circular path.

When it is desired to decrease the speed at which the tool 97 is operated, the lever 53 may be manipulated to move the clutch member 46 into engagement with the face of either of the beveled gears 44 or 45, in which operation the means for driving the shaft 34 is shut oil', or disconnected, and said shaft is driven through the shaft 35, the worm 39, the worm gear 40, the pinion 43 and either of the beveled gears 44 or 45, as will be readily understood.

The object of driving the shaft by means or the eccentric gears 58 and 59 is to speed at which it travels in thel different positions thereof, and in the construction of eccentric gears as shown, said tool will be driven slowly, while performing its cutting operation, or while operating upon the workpiece 151, but will travel very quickly in its idle movement, or while bringing it from its last cutting position to its first cutting position. It must also be understood that in cutting one radius which is common throughout the length or width ofthe workpiece, said workpiece is fed in a horizontal plane in the usual manner in cutting elongated recesses in workpieces of various kinds and classes, but it will be understood that with my improved machine any desired form of recesses or milling operations may be performed in a workpiece that can b e performed on milling machines, as now constructed, or that are now in use and many operations that cannot be performed onthe present machines may be accomplished on my improved machine by reason of the construction thereof, or the means employed for operating the tool 97. It must be also understood that elliptical or other irregular shapes or forms of apertures may be milled into a workpiece by moving the bed plate 22 vertically to reduce the distance between the face 153 of the workpiece and the center. of the shaft 78, or the mark 154 indicated in Fig. 2. I

s The method of operating the tool 97 which may be of any preferred form and construetion, as herein shown and described, moves said tool through a circular or approximately circular path, and the cutting face of the tool moves'or operates in the workpiece through an arc-shaped path, as clearly illustrated in Figs. 10 and 11 of the drawing, and while I have described the tool 150as 4 being rotated to rough out a work iece 151,

-it will be understood that on certain classes into the position shown in Fig. 14, while the racks 74 and 84 remain in the position shown in Figs. 1, 2, and 3, and the operation of the machine, as hereinbefore described for operating the tool 97, as indicated in Figs. 10 to 13 inclusive, will operate the tool 150 in the same manner, 'while said tool is rotated, this combined movement being accomplished by connecting the pulleys 38 and 144 with a belt, as hereinbefore described.

It will also be understood that the tool 150 35 may be rotated when in use as shown in Fig.

14, in two ways first by driving`the shaft 137 direct by any suitable motor power, om said shaft may be `driven through the shaft 34, the beveled gears 44 and 45, the beveled pinion 43, the wormgear 40 and worm 39, the pulleys 38 and the pulleys 144, and while I have shown certain details of constructlonl for carrying my invention into effect and have designated a predetermined dimension between the centers ofthe shafts 60 and 78, and the center of the shaft 78 and the face that these dimensions may be increased or 153 of the workpiece, it will be understood decreased provided that they are of the same relative proportion, the dimensions indicated being what may be termed the happy medium or those most suitable for the -average work, and other changes in and modifications of the details of construction herein shown and described may be made, within the scope of the appended claims, without departin from the spirit of my` invention or sacri cing its advantages, and means other than those herein described may be employed for operating the tubular tool Sillaft 123. f

Having fully described my invention, whatI claim as new and desire to secure by Letters Patent, is

1. In a milling machine of the class described, a tool holder, means for giving said tool holder a combined lateral and vertical -oscillatory movement, a supplemental tool f by said supplemental tool holder may be glven av combined' lateral and vertical oscillatory movement in the operation thereof.

2. In a machine of the class described, a frame, al drive shaft mounted therein, a power shaft driven by said drive shaft, a cross head connected with said power shaft, a main drive rack adjustably mounted in said cross head, a supplemental driven rack geared in connection with said main drive rack, an oscillatory shaft mounted in said frame the center of which is a predetermined distance from the center of lthe power shaft, an oscillatory head connected with said oscillatory shaft and through vwhich said lracks are ladapted to pass, and

means for supporting a tool in connection with said supplemental driven rack.

3. In a machine of the class described, a

frame, a `drive shaft mounted therein, a power shaft driven by said main drive shaft, a -cross head connected with said power shaft, a main drive rack adjustably mounted in said 'cross head, a supplemental driven rack geared in connection with saidmain drive rack, an oscillatory shaft mounted in said frame the center of which is a predetermined distancefrom the center of the power shaft, an oscillatory head connected with said voscillatory vshaft and through which said racks are adapted to pass, means for supporting a tool s. supplemental driven rack., and means on the main drive shaft for reducing the speed at which the power shaft is driven and the direction which said shattis driven.

li. In a machine or the class described, a frame, a drive shaft mounted therein, a power shaft driven by said main drive shaft, a cross head connected with said power shaft, a main drive rack adjustably mounted in said cross head, a supplemental driven rack geared in connection with said main drive rack, an oscillatory shaft mounted in said trame the center of which is a predetermined distance from the center of the power shaitt, an oscillatory head connected with said oscillatory shaft and through which said racks are adapted to pass, means for supporting a tool in said supplemental driven rack, means on the main drive shaft torreducing the speed at which the power shaft is driven and the direction which said shaft is driven a supplemental rotary tool holder mounted in said supplemental rack, andv means for member, a Yiame and main dr.l f. provided at one end with cross i, a main drive rack adjustably mounted in said cross head, an oscillatory shaft mounted in said trame, an oscillating head secured to one end of said last named shaft and through which said main drive rack is adapted to move, a supplemental driven rack movably mounted in said oscillating head and geared in connection with said main drive rack, said supplemental driven rack being provided at one end with an enlarged head portion, and means for adjustablv supporting a tool in the other end thereof.

6. In a mwiine of the class described, a frame. a main drive shaft mounted therein, a supplemental drive shaft mounted beneath said main drive shaft and geared in connection therewith through a clutchmember` a power shaft mounted in said lframe and geared in connection with the main drive shaft, said power shaft being provided at one end with a cross head, a main drive rack adjustably mounted in said cross head, an oscillatory shaft mounted in said frame, an oscillating head secured to one end of said last named shaft and through which said main drive rack is adapted to move, a supplemental driven rack movably mounted in said oscillating head and geared connection with said main drive raclr, aie` supplemental driven rack being provided at one end with an enlarged head portion, means for adjustably supporting a tool in the other end thereof, a supplemental, rotary tool holder adjustably mounted in said supplemental rack, and. means for driving said rotary mol holder.

7. a machine of the class described, a .-iame, a main drive shaft mounted therein, a supplemental drive shaft mounted beneath said main drive shaft and geared in connection therewith through a clutch member, a power shaft mounted in said trame and geared in connection with the main drive shaft through eccentric gears, said power shaft being provided at one end with a cross head, a main drive rack adjustably mounted in said cross head, an oscillatory shaft mounted in said frame, an oscillating head secured to one end ort' said last named shaft and through which said main drive rack is adapted to move, a supplemental driven rack movably mounted in said oscillating head geared in connection with. said main drive rack, said supplement-al driven rack e provided at one end with an enlarged e d iortion, and for adjustably supf a tool iii the other end thereof.

n a machine of the class described, a `1`ne, main drive shaft mounted therein., a "lementai drive shaft mounted in said e, bevele gears rotatably mounted on main drive shaftand geared in connec- V n with said supplemental drive shaft, a clutch member in operative connection with said beveled gears, means for operating said clutch member, a` power shaft mounted in said frame, eccentric gears for gearing said power shaft and the' main drive shaft together, one end of the power shaft being provided with a cross head, a main drive rack adjustably mounted in said cross head, an oscillatory shaft mounted in the frame, one end of said shaft being provided with an oscillatinghead through which said main drive rack is adapted to pass, a supplemental driven rack movably mounted in said oscillating head, means for gearing said racks together, and an adjustable tool holder mounted in said supplemental rack.

9. In a machineof the class described, a frame, a main drive sha-ft mounted therein,` a supplemental drive shaft mounted in said frame, beveled gears rotatably mounted on said main drive shaft and geared in connection with said supplemental drive shaft, a clutch member in operative connection with said ybeveled gears, means for operating said clutch member, a power shaft mounted in said frame, eccentric gears for gearing said power shaft and the main drive shaft together, one end of thepower shaft being provided with a cross head, a main drive rack adjustably mounted in said cross head,

an oscillatory shaft mountedin the frame,

one end ofsaid shaft being provided with an oscillating head through which said main drive rack is adapted to pass, asupplemental driven rack movably mounted in said oscillating head, means for gearing said rac-ks together, an adjustable tool holder mounted in said supplemental rack, means adjustably mounted in the supplemental rack for supporting a rotary tool holder, and means for drive shaft, a rack construction adjustablyv connected with one end portionof said power shaft, an oscillating guide for said rack construction, means for adjustably connecting a tool holder with said rack construction, and means on said drive shaft for varying the speed at which the power shaft is driven and for governingthe' direction at which said shaft is driven.

12.A In a machine of the class described, a frame, a drive shaft mounted therein, a power shaft geared in connection with said drive shaft, a rack construction adjustably.

connected with one end portion of said power shaft, an oscillating guide for said rack construction, means for adjustably connecting a tool holder with said rack construction, and a supplemental tool holder adjustably connected with said rack construction. y

13. In a machine of the class described, a frame, a drive shaft mounted therein, a power shaft geared in connection with said drive shaft, a rack construction adjustably connected with one end portion of said power shaft, an oscillating guide for said rack construction, means for adjustably connecting a tool holder with said rack construction, a supplemental tool holder adjustably connected with said rack construction, and means for operating said supplemental tool holder.

14. In a machine of theclass described, a frame, a drive shaft mounted therein, a

o power shaft geared in connection with said drive shaft, a' rack construction adjustably connected with one end portion of said power shaft, an oscillating guide for said rack construction, means for adjustably connecting a tool holder with said rack construction, a supplemental tool holder adjustably connected with said rack construction, and means involving said rack construction for operating said supplemental tool holder.

l5. In a milllng machine, a tool holder,

a support for said holder, means for giving a' said tool holder an oscillatory movement in said support, and means whereby said support is given a rotary oscillatory movement in the oscillatory movement of said tool holder.

16. In a milling machine, a, tool holder, means for supporting and guiding said holder, means for giving said tool holder an oscillatory movement in said support and 'guliding means, and means whereby said first vnamed means may lbe given a rotary oscillatory movement in the movement of said tool holder therein.

\'17.' In a milling machine, a tool holder, means for Isupporting and guiding said holder, means for giving said tool holder an oscillatory movement in said support and guiding means, means whereby said irst named means may be given a rot-ary oscillatory movement in the movement of said tool holder therein, and means for giving `said tool holder a rotary movement in the aforesaid oscillatory movement.

18. In a milling machine, a, tool holder, means for supporting and guiding said holder, and means for giving said tool holder a vertical oscillatory movement in said supporting and guiding means, and for giving said supporting and guiding means a rotary oscillatory movement in the movement of said tool holdertherethrough.

19. In a` milling machine, a tool holder, means for supporting and guiding said tool holder, means for giving said tool holder a vertical oscillatory movement through said supporting and guiding means and for giving saidsupporting and guidingmeans al rotary oscillatory movement, a supplemental tool holder'mounted adjacent to said first named tool holder, and means for giving said supplemental tool holder a rotary movement.

20. In a mtilling machine, the combination with a rotary tool holder and means for rotating the same, of a vertical oscillatory tool holder, .means for supporting and guid- `ing said oscillatory tool holder, and means for giving said last named tool holder a vertical l oscillatory movement in the supporting and guiding means therefor and for giving said supporting and guiding meansl a rotary oscillatory movement.

21. In a milling machine, the combination with a rotary tool holder and means for rotating the same, of a vertical oscillatory tool holder, means for supporting and guiding said oscillatory tool holder, means for giving said last named tool holder a vertical oscillatory movement in .the supporting and guiding means therefor and for giving said supporting and guiding @means a rotary oseillutmy movement, and means for giving said rotnry tool holder a vertical und lateral osrilhitory movement.

22. in n nnrchine of the class described, n traine; a drive :shaft mounted therein, a Vpower shaft f ,red in connection with said drive shaft, o. tool holder, means for guiding seid tool holder, and means in operative connection ubit i smid power shaft for giving said tool hol( er un oscillatory movement Vthrough said guiding means.

23. in n mfzchine ot the class described, a trame. n drive shaft mounted therein, :i power slniit ,geared in connection Wit-h said drive shaft, n tool holder, means for guiding seid `'tool holder` means in operative connection with seid power shaft. for giving Said tool holder un oscillatory movement through said 2guiding' means, :ind means whereby the extent oiC the oscillatory movenient of Suid tool holder may be varied.

ln u nmchine of 'the class described, e freine. u drive shet't` mounted therein, it power shaft geared in connection with said drive shaft in oscillatory guide mounted in :seid trame, e tool Supporting member slidzihly mounted in seid guide, and means for giving sind tool supporting member en oscillatory movement through seid guide.y in n machine of the class described, e freine, it drive shaft mounted therein, a.

power shaft. geared in connection with said giving said tool holder en meneer drive shaft, an oscillatory guide mounted in said frame, e tool supporting member Slidebly mounted in said guide, meansfor giving said tool Supporting member en osc'ilntory movement through said guide, und `ineens for edjustubly connectingn toc-l wien Said tool supporting member.

2S. ln a machine of the class described, a trame. a drive shaft mounted therein, e power shaft geared in connection With seid drive shaft by eccentric gears, en oscilletory guide mounted in said frame, a, rack construction adjust-ably connected With one end portion of seid power shaft and slidebly mounted in said oscillatory guide, and means for adjustably connecting a tool holder with said rock construction,

:27. ln n milling machine, a rotary oscillatory head, n tool holder moi/'ably mounted in connection with said head, and means tor oscillatory movement in said head and for oscillating said head.

In 'testimony that l claim `che foreecin :is my invent-ion l' hei-re Signe presence of the subecribing Bist dey of December,

SHAB-LES G.

litnesses "Y, BERGMAN,

THoMrson, 

